Strawberry Rhubarb Crisp (Easy, Crowd-Pleasing and Perfect for a 9x13 Pan)
This easy strawberry rhubarb crisp is bursting with sweet-tart fruit and topped with a buttery, crumbly oat topping. Perfect for a 9x13 pan and simple enough to make with fresh or frozen rhubarb.
The Only Strawberry Rhubarb Crisp Recipe You Will Ever Need
There is something almost magical about the combination of strawberries and rhubarb. The berries bring sweetness and softness, the rhubarb brings that sharp, almost floral tartness, and together they melt into a jammy, bubbling filling that is completely irresistible. Layer all of that under a buttery, golden oat crumble topping and you have one of the most crowd-pleasing desserts in the entire summer repertoire.
This recipe is designed for a 9x13 pan, which means it feeds a crowd easily and is ideal for potlucks, family dinners, and backyard cookouts. It works with both fresh and frozen rhubarb, making it a recipe you can lean on year-round.
Why This Recipe Works So Well
A lot of rhubarb crisp recipes end up either too soggy or too dry, with a topping that steams instead of crisps. The secret here is a few key details:
- Cornstarch in the filling absorbs the fruit juices as they cook, giving you a thick, glossy filling rather than a watery pool.
- Cold, cubed butter worked into the topping creates those irresistible crumbly clumps that bake up golden and crisp.
- Old-fashioned rolled oats (not quick oats) give the topping real texture and a nutty, satisfying bite.
- A splash of maple syrup in the filling adds a subtle warmth and depth that plain sugar alone cannot match, making this a genuinely maple-sweetened strawberry rhubarb crisp that feels a little more special.
Chef's Tip: Do not skip draining your frozen rhubarb. Frozen fruit releases a lot of liquid as it thaws, and if that goes straight into the baking dish, your filling will be watery no matter how much cornstarch you use.
Fresh or Frozen Rhubarb? Both Work Beautifully
One of the best things about this recipe is its flexibility. If rhubarb is in season, grab the freshest stalks you can find, bright red ones tend to be sweeter and more vibrant in color. But this is also a fantastic rhubarb crisp using frozen rhubarb, which means you can make it in the middle of January when you are craving something bright and fruity.
The technique is simple: thaw, drain, and pat dry. After that, frozen rhubarb behaves almost identically to fresh.
Using quality tools and a good heavy baking dish makes a real difference when it comes to even baking and a properly crisped topping. A reliable pastry cutter also saves your hands when working cold butter into the crumble.
How to Get the Perfect Crumble Topping
The topping is what separates a good crisp from a great one. Think of it as a 5-ingredient rhubarb crisp topping in spirit: oats, flour, brown sugar, butter, and cinnamon are really the heart of it. Here is what to keep in mind:
- Work the butter in until the mixture clumps together when you squeeze a handful. Those chunks are flavor.
- Spread the topping edge to edge. Every bite should have crumble.
- Do not pack the topping down. Leave it loose so hot air can circulate and it bakes up crunchy rather than dense.
Chef's Tip: For an extra nutty, rich topping, brown the butter before chilling it and using it in the crumble. It adds a toffee-like depth that pairs beautifully with the tart rhubarb.
Ready to make it? Here is the full step-by-step recipe:
Strawberry Rhubarb Crisp (Easy, Crowd-Pleasing and Perfect for a 9x13 Pan)
This easy strawberry rhubarb crisp is bursting with sweet-tart fruit and topped with a buttery, crumbly oat topping. Perfect for a 9x13 pan and simple enough to make with fresh or frozen rhubarb.
Ingredients
- 4 cups fresh or frozen rhubarb, cut into 0.5-inch pieces, thawed and drained if frozen
- 3 cups fresh strawberries, hulled and halved
- 1/2 cup granulated sugar, for the fruit filling
- 2 tbsp pure maple syrup, adds a warm, natural sweetness to the filling
- 3 tbsp cornstarch, helps thicken the fruit juices
- 1 tsp vanilla extract
- 1 tbsp lemon juice, freshly squeezed
- 2 cups old-fashioned rolled oats, do not use quick oats
- 1 cup all-purpose flour, spooned and leveled
- 3/4 cup brown sugar, packed, light or dark both work
- 1 tsp ground cinnamon
- 1/4 tsp salt
- 1/2 cup unsalted butter, cold and cubed
Instruction
Preheat your oven to 350 degrees F (175 degrees C) and lightly grease a 9x13-inch baking dish.
If using frozen rhubarb, thaw it completely and drain off any excess liquid before measuring.
In a large bowl, combine the rhubarb, strawberries, granulated sugar, maple syrup, cornstarch, vanilla extract, and lemon juice. Stir well until the fruit is evenly coated.
Pour the fruit mixture into the prepared 9x13 baking dish and spread it into an even layer.
In a separate large bowl, mix together the rolled oats, flour, brown sugar, cinnamon, and salt until combined.
Add the cold, cubed butter to the oat mixture. Use your fingertips or a pastry cutter to work the butter in until the mixture resembles coarse, clumpy crumbles. Some pea-sized chunks of butter are perfectly fine and desirable.
Scatter the crumble topping evenly over the fruit layer, covering it fully from edge to edge.
Bake for 40 to 45 minutes, until the topping is deep golden brown and the fruit filling is bubbling around the edges.
Remove from the oven and let the crisp rest for at least 15 minutes before serving. This allows the filling to set slightly.
Equipment
- 9x13-inch baking dish
- Large mixing bowl (x2)
- Pastry cutter or fork
- Measuring cups and spoons
- Cutting board and knife
Notes
Serving, Storing, and Making It Your Own
Serve this crisp warm from the oven with a generous scoop of vanilla ice cream or a dollop of lightly sweetened whipped cream. The contrast of hot, bubbling fruit and cold cream is everything.
For make-ahead convenience, assemble the entire crisp up to 24 hours in advance, cover it tightly, and refrigerate it unbaked. When you are ready, it goes straight into the oven with just a few extra minutes of bake time.
Leftovers reheat beautifully. A quick spin in a 325 degrees F oven for 10 to 15 minutes brings the topping right back to life.
Want to mix it up? Try these easy variations:
- Swap half the strawberries for fresh blueberries or raspberries
- Add 0.5 tsp of ground ginger to the filling for a spiced version
- Use the same topping formula for an apple crisp in the fall
However you make it, this strawberry rhubarb crisp is the kind of recipe that disappears fast and gets requested even faster.
